configure

#!/bin/bash

# Helpers {{{

# just a shorthand for populating .install.mk
inst () {
  echo -e "\t@install $1" >> .install.mk
}

split () {
  local i=0
  OLDIFS=$IFS
  IFS=$2
  for x in $3; do
    eval $1[$i]=$x
    i=$((i+1))
  done
  IFS=$OLDIFS
}

# returns 0 iff $1 > $2
# $1 and $2 must be lists of numbers, dot-separated
too_old () {
  local A
  local B
  split A . "$1"
  split B . "$2"
  for (( i=0; i<${#A[*]} || i<${#B[*]}; ++i )); do
    if (( ${A[$i]:-0} > ${B[$i]:-0} )); then
      return 0
    fi
  done
  return 1
}

# }}}
# Parse arguments {{{
while (( $# )); do
  case "$1" in
    --prefix=*) 
      PREFIX="${1:9}";;
    --prefix)
      shift
      if (( $# == 0 )); then
        echo "Missing prefix."
        exit 2
      fi
      PREFIX=$1;;
    *) 
      echo "Strange argument: $1" 2> /dev/stderr
      exit 2;;
  esac
  shift
done
# }}}
# Check that an OCaml compiler is present. {{{
OCAML_VERSION=$(ocamlc -version 2> /dev/null)
if too_old 3.11 $OCAML_VERSION; then
  echo "Please make sure that ocamlc >=3.11 is in your PATH." 2>&1
  echo "See http://caml.inria.fr/ocaml/release.en.html" 2>&1
  exit 1
fi
# }}}
# Generate install target {{{
echo -e "install: install.native\n\ninstall.%:%" > .install.mk
inst "-d $PREFIX/bin"
inst "-m=rx bin/jstar $PREFIX/bin"
for d in `find library -type d`; do inst "-d $PREFIX/$d"; done
for f in `find library -type f`; do inst "-m=r $f $PREFIX/$f"; done
# }}}